DOI: 10.1016/j.watres.2018.12.027
Scopus记录号: 2-s2.0-85059477030
论文题名: Arsenite removal without thioarsenite formation in a sulfidogenic system driven by sulfur reducing bacteria under acidic conditions
作者: Sun J. ; Hong Y. ; Guo J. ; Yang J. ; Huang D. ; Lin Z. ; Jiang F.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 362
结束页码: 370
语种: 英语
英文关键词: Acid mine drainage
; Arsenic removal
; Sulfidogenic process
; Sulfur reducing bacteria
; Thioarsenite
; Wastewater treatment
Scopus关键词: Arsenic
; Bacteria
; Effluents
; Electron transport properties
; Pollution control
; Sulfur
; Sulfur compounds
; Wastewater treatment
; Water pollution
; Acid mine drainage
; Arsenic removal
; Direct electron transfer
; Electron transport
; Long-term experiments
; Sulfate reducing bacteria
; Sulfur reducing bacterium
; Thioarsenite
; Chemicals removal (water treatment)
; arsenic trioxide
; acid mine drainage
; acidity
; arsenic
; arsenite
; bacterium
; effluent
; experimental study
; microbial activity
; pH
; pollutant removal
; precipitation (chemistry)
; reduction
; wastewater
; wastewater treatment
; water pollution
; acidity
; Article
; Desulfurella
; electron transport
; Gram negative anaerobic bacteria
; hydraulic retention time
; nonhuman
; oxidation reduction potential
; pH
; precipitation
; priority journal
; reduction (chemistry)
; room temperature
; waste component removal
; waste water management
; water contamination
; Desulfurella
英文摘要: Sulfidogenic process using sulfate-reducing bacteria (SRB) has been used to remove arsenite from the arsenic-contaminated waters through the precipitation of arsenite with sulfide. However, excessive sulfide production and significant pH increase induced by sulfate reduction result in the formation of the mobile thioarsenite by-products and the inefficiency and instability of arsenite removal, especially when the arsenite level fluctuates. In this study, we proposed a novel sulfidogenic process driven by sulfur reducing bacteria (S0RB) for the arsenite removal under acidic conditions. In a long term experiment, efficient sulfide production (0.42 ± 0.2 kg S/m3-d) was achieved without changing the acidic condition (pH around 4.3) in a sulfur reduction bio-reactor. With the acidic sulfide-containing effluents from the bio-reactor, over 99% of arsenite (10 mg As/L) in the arsenic-contaminated water was precipitated without the formation of soluble thioarsenite by-products, even in the presence of excessive sulfide. Maintaining the acidic condition (pH around 4.3) of the sulfide-containing effluent was essential to ensure the efficient arsenite precipitation and minimize the formation of thioarsenite by-products when the arsenite to sulfide molar ratios ranged from 0.1 to 0.46. An acid-tolerant S0RB, Desulfurella, was found to be responsible for the efficient dissimilatory sulfur reduction under acidic conditions without changing the solution pH significantly. The microbial sulfur reduction may proceed through the direct electron transfer between the S0RB and sulfur particles, and also through the indirect electron transport mediated by electron carriers. The findings of this study demonstrate that the proposed sulfidogenic process driven by S0RB working under acidic conditions can be a promising alternative to the SRB-based process for arsenite removal from the arsenic-contaminated waters. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122040
Appears in Collections: 气候变化事实与影响
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作者单位: School of Chemistry & Environment, South China Normal University, Guangzhou, 510631, China; MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou, 510006, China
Recommended Citation:
Sun J.,Hong Y.,Guo J.,et al. Arsenite removal without thioarsenite formation in a sulfidogenic system driven by sulfur reducing bacteria under acidic conditions[J]. Water Research,2019-01-01